cos

 

 

Overview

The cos function computes the cosine of its argument (an angle expressed in radians).

Complex

The cos function returns the cosine of a complex argument expressed in radians (pi radians equals 180 degrees).

Usage

The cos function is used to compute the cosine of a value.

Complex

The cos function is used to determine the cosine of angle when the angle is complex. Do not use if an immediate type, such as a real number, would suffice. Since complex numbers are heap objects, they require more space and operations on these types are slower than on immediate types.

 

Syntax

Expression:

(cos num)

Arguments Name Type Description
Argument:numNumber A Number

Returns:

Computes and returns the cosine of the Number argument (in radians).


Expression:

(cos angle)

Arguments Name Type Description
Argument:angleNumber The angle expressed in radians.

Returns:

A complex number holding the cosine of the angle.

 

Examples

Here are a number of links to Lambda coding examples which contain this instruction in various use cases.

 

Argument Types

Here are the links to the data types of the function arguments.

Number

Here are also a number of links to functions having arguments with any of these data types.

++ += + /=
/ * -- -=
- abs acos add1
addMethod addi argument arithmetic
asin atan avg binaryInsert
boolean character compareEQ compareGE
compareGT compareLE compareLT compareNE
compare cons cos cosh
count date day days360
decode deg display divi
exp expt fact floor
fraction getTickCount hour iadd
icompareEQ icompareGE icompareGT icompareLE
icompareLT icompareNE idiv imod
imul inside integer isAtom
isBitVector isBoolean isByteVector isChar
isCharacter isComplex isDate isDictionary
isDirectory isEqual isError isEven
isExact isFloatVector isIdentical isInexact
isInside isIntegerVector isInteger isLambda
isMatrix isMember isMoney isNegative
isNull isNumberMatrix isNumberVector isNumber
isObjectVector isObject isOdd isPair
isPcodeVector isPositive isString isStructure
isSymbol isText isType isVector
isZero isub julian kurtosis
length list log10 log2
log logbase macroReplace makeQuotedList
max median member min
minute mod modi money
month muli nadd ncompareEQ
ncompareGE ncompareGT ncompareLE ncompareLT
ncompareNE ndiv new nmod
nmul now nsub number
objectToMatrix objectToNumMatrix objectToNumVector pair
parent parse pi product
rad random randomize range
ref remove round saveObject
saveRepository second setCar setCdr
setLastCdr setq sigmoid sign
sin sinh sizeof skew
sleep sqrt srandom stdev
stdevp string sub1 subi
submit sum sumsqr tan
tanh time type uniqueInsert
var varp vectorBinaryInnerProduct vectorBipolarInnerProduct
vectorCosineInnerProduct vectorCubeInnerProduct vectorExpInnerProduct vectorFill
vectorInnerProduct vectorLogInnerProduct vectorQuartInnerProduct vectorQuintInnerProduct
vectorSigmoidInnerProduct vectorSineInnerProduct vectorSquareInnerProduct vectorTanInnerProduct
vectorTanhInnerProduct writelg writeln year

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